Gas-producer.



No. 665,730. I Patented' 1an. 8, |901.

' E IJ. UUFF.

GAS PBUDUGER.

y(Applimion med June 7, 1900.)

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ATTORNEYS m m 8 m a l. d e t n e t a P ,3. ru FU UD nunu .3. .JPv G 0. 37 5 6 6 0. N

(Application dma :une 7, 1906.-)

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GAS PRODUCER. (bplicnton led A."hum 7, 1900;)

3 Sheets-Sheet 3 INQENTOR l ATTORNEYS Y. subject of theQueen of GreatBritain and Irein the eliciency of the gas-producer and rev horizontalsection of a gas-producer provided y .plates C, which are fixed by theiranged parts them'at their top ends, which extend a com- 5o larly tothose of the lower casing. The cover Iportions A B, which are locatedvin .thelower UNITED STATES PATENT OFFICE.

` EDWARD JAMES DUFF, OF LIVERPOOL, ENGLAND.

GAS-PRODUCER.

SPECIFICATION forming` part of Letters Patent No. 665,730, dated January8, 1901.

Application filed J une 7, 1900.

To all whom, t may concer/t.

Beit known that I, EDWARD J AMES DUFE, a

land, and a resident ofLiverpool,in the county of Lancaster, England,(whose postal address is HollyrjLodge, Cressington Park, Liverpool,England,) have invented certain Improvements in Gas-Producers, of whichthe following is a specification, and for which I have applied forBritish Patent No. 3,631, dated February 24, 1900. v

My said invention relates to gas-producers of the kind described in myPatent Specification No. 517,271 of 1894; and it has for its object toprovide improvements in the grate or casing on which the fuel isreceived to be acted on by the steam-laden air, so as thereby by suchimprovements to elect an-increas'e duce the cos't of working.

In the accompanying explanatory draw ings, Figures 1 and 2 are-verticalsections as at right angles to each other,;and Fig. 3 is a with theimprovements.

According' to the invention the improved grate part is composed of`lower and upper part of the producer.' The lower portion orblower-casing A consists of sloping or inclined D to `a seating E, ofbrickwork, the ends of the casing being xed or built into the mainsidewalls F of the producer. Y The plates C are inclined upward from thesides toward each other'and so as to leave a space between parativelyshort'distance above the water in theash-trough G2 Distance-pieces Harepro- The. connectingpieces H are fixed at intervals in the interveningtop space, so as to leave suiiiciently large openings K for the passageof air to the fuel-bed. The upper portion or cover B extendsalong thetop of the lower casing A and is a casting in the form of an inverted Vin cross-section, having its sides sloping simi- B is fixed over thelower casing A, so as to form wide sloping side passages or outlets LSerial No, 19,398`r (No model.)

for air extending completely across the producer, the lower edges of thecover extending down to within a com paratively short distance from thenormal level ofthe water in the ashtroughG. The cover is formed withbrackets M, by means of which it is fixed to the lower casing A, orinstead of or in addition to this method of attachment the cover mayhave its ends fixed or built into tbe main sidewalls F sages L betweenthe cover B and the casing,

issuing from below the lower edges of the cover `to mingle with thefuel, so that the 'air is 'thereby blown in to the fuel-bed at thelowest point or immediately above the water in the ash-trough G. Theashes or residuesfall upon thesloping side or delivery plates C,

, which extend toward the sides of the producer and below thewater-level in the ash-trough G, the ashes being thereby directed towardopenings,th rough which they may be removed vby means of shovels orrakes. 1 The other parts of the gas-producer are constructed andarranged substantially in the same manner as described in my earlierspecification hereinbefore referred. to.

Important advantages are obtained from. the use of thehereinbefore-d'cscribed vim provements. A grate-casing or fuel-receivingpart made with perforations or gratings as described in my earlierspecification is found to be unsuitable Where the gas is being'generatedwith a view 'to the recovery of ammonia from the resultant gas. a largevquantity of steam is used along witho the entering air, and the excessof steam.. meistens the fuel-dust falling through the perforations,causing Athe dust to adhere to thegratings and resulting eventually inthe choking and rusting up of these air-passages. By the use, however,of the improved blowercasing and cover, as hereinbefore described, nochoking of the parts can take place, as the In such-cases IOOair-passages and parts are so constructed and arranged that there is notendency for the fuel-dustto adhere to the sides and block up theair-openings. 'A great advantage is also gained in am monia-gasproducers by blowing the air into the fuel-bed at the lowest point, asdescribed in the im rovements. By this means a greater heigh of fuel ispresented for the steam-laden air to pass through in its upward coursethrough the fuel-bed, and thus the steam is better-broken up, and theamount of'carbonic acid formed in the resultant gas is thereby reduced,lthe higher blast-pressure used in ammonia-gas producers enabling theair tol be sufficiently distributed throughout the'fu'el-bed. v

What I claim as my invention is 1. A gas-producer provided with awatersealed ash-trough,a blower-'casingand a cover therefor having.inclined sides extending completely across the lower part of theproducer, the top of the casing and the bottom of tle cover being placednear the normal level of water in tl'1e""ash-trough to give air-outletsthere extending across the producer, substantially as and forthepurposesherein set forth.

2. A gas-producer .provided with a Watersealed ash-troughand ablower-casing locateds in the lowerpart ofthe producer and extendingacross the producer, said casing having inclined `sides and being`formed with openings along the top, and being xed to a brick ,Workseating and provided with an inlet for the admission of steam and airfor combus- `tion or gasification, in combination" with a cover tol formwith the casing downwardlysloping air-passage extending across theproducer, all substantially `as'and for the purposes herein set forth. Y

3. A gas-producer provided with a Watersealed ash-trough a blower-casingand a cover therefor, the blwer-casing and cover both having inclinedsides extending across the lower part of 4the producer, the lfop ofthecasing and the bottom of the cover, between which are/(he air-outlets,being placed near lthe normal level of the .water in the ashtrough,substantially asand for'the purpose described.`

In testimony', whereof I have. signed my name to this specification inthe presence of two subscribing witnesses.

EDWARD Witnesses: H. S. MATHEWSON, FI. WATSON.4

JAMESDUFF..

